[asterisk-bugs] [JIRA] (ASTERISK-20650) Asterisk resets ptime value in 200 OK response

[i2045 (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=202197#comment-202197 ] 

i2045 commented on ASTERISK-20650:
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I experience problems with RTP packetization also with Asterisk 11.2.1 (see ASTERISK-20976).
To investigate when RTP packetization stopped working i installed a few older releases of 1.8 and 1.6 and 1.4 and all indicated ptime:30 with codec ulaw:30 but the RTP packets were sent each 20ms instead.
I have attached a packet capture of Asterisk 1.4.26.
Has someone got RTP packetization working with a (recent) Asterisk release?
                
> Asterisk resets ptime value in 200 OK response
> ----------------------------------------------
>
>                 Key: ASTERISK-20650
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20650
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General, Resources/res_fax
>    Affects Versions: 1.8.17.0
>            Reporter: Maciej Krajewski
>            Severity: Critical
>         Attachments: ast_config.zip, Asterisk_1_4_26_RTP_packetization.pcap, debug_5-autoframing_yes.cap.gz, debug_5-autoframing_yes.log, tmptk_20121102_1527_g02_editcap.cap, tmptk_20121105_1155_g03_edit_filtr.cap
>
>
> Today I have found a problem concerning asterisk 1.8.X
> I've migrated one of my servers from old version of asterisk 1.4 branch to the newest 1.8.
> Everything works fine, but faxes has stopped working.
> I've made some research and what I have found is that asterisk 1.8 has some problems with transcoding ptime, it simply does not do this, Astersik 1.4 was coping with this.
> I've attached the cap file where one of my legs is negotiating connection with ptime 10, the other one with ptime 20.
> However if you look at the payload of RTP packets it is 10 ms every where.

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